The broadcaster said their debate on May 24 will include the leaders of the four “main” parties.

But the Greens said this “ignores the fact” that the Scottish Greens have more MSPs than the Lib Dems, more members than the Lib Dems, and are currently polling ahead of the them.

They also say this format would mean “one pro-independence voice against three anti-independence voices”.

A spokesman for the Scottish Greens said: “STV froze us out of their general election debate in 2015 but doing so two years later after so much has changed in Scottish politics is simply bizarre. Patrick Harvie was on the stage in their Holyrood election debate just last year.

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